Air-brake apparatus.



H. M. P. MURPHY. AIR BRAKE APPARATUS.

APPLIOATION FILED APRA, 1908.

Patented Feb. 16, 1909.

.UNITED STATESPATENT fl'llliltj li,

AIR-BRAKE APPARATUS.

No. 912,717. Specification of Letters Patent.

Application filed April 4, 1908. Serial No. 425,197.

Patent-ed Feb. 16, 1909.

To all whom it may concern: the head I and upon this portion ol' thecas- 'Be it known that l, llowwnn .\i. l. .\l 'a- 1 ing head, twosegments s are movably Pin', a resident of littsburg, in the countydisposed. These segments are provided of A-Ulegheny and State ofPennsylvania, Y nilh annular owl-lapping portions which D have inventedcertain new and uscl'ultiml encircle the sleeve t, and each segment isprovements in Air-Brake Apparatus; and also provided with an elongatedslot t) For 1 do hereby declare the following to be a the passage of ascrew it), the threaded port'ull, clear, and exact description oi theinlion o'l which enters the portion 7 of the vcntion, such as willenable others skilled valve casing, and the heads 11 of the screws inthe art to which it apperlains to make 10 are adapted to engage theupper faces of and use the same. the segments and retain the latter inany This invention relates to improvements position to which they may headjusted. in air brake mechanism and more particu- Lugs or stops l2-l2project laterally from larly t0 means for contrclling the operatheportion 7 oi the casing. in position to 15 tion of a brake valve such asis usually embe engaged by a spring-pressed rod or bar ployed to bemanually operated by the enllcarried by the lever or handle 5 whengineer for controlling the operation ot the latter is swung in onedirection or the triple valve mechanism in eli'ecting the. apother fromits intermediate position, for the plieation and release of the brakes.purpose of making an emergency applica- The object ot'my presentinvention is to tion or a release of the brakes. Normally,

provide simple and efiicient means for inthe springpressed rod or bar itmay ensurii'ig the proper operation of the brake l gage a notch 15 inthe portion 7 of the casvalve for trains of difl'erent. lengths, so ing,when the valve will he in a lap pothat an engineer will be preventedfrom aesition.

eidentally causing an excessive rise or fall The respective segments 3 9may be made of train pipe pressure on trains of moderate to registerwith gradnations 16 which may length or on short trains. be numbered todesignate different numbers A further object to so construct the de ofcars of which a given train may be comvice that it can be set forcontrolling the posed. so that when the segments are adbrakes of fromone to any desired number justed to register with certain of saidgraduof cars. alions, the moven'uml. ot' the hand lever 5 l/Vith theseobjects in view, the invention will be limited by the engagement of therod consists in certain novel :leatures of conor bar ll with one or theother of the segstruction and combinations and arrange- :ncnls, and thusprevent the valve from bements of parts as hereinafter setlorlh and ingopened too l'ar l'or applying or releasing pointed out in the claims.the brakes on the number of cars which may,

in the accompanying drawings: Figure at this time, compose the train. 1is a plan view ol" a brake valve emit will be observed that. the segment8 is bodying my in'iprm'cments, and Fig. 2 is a sonu-what narrower thanthe segment 9, so

40 sectional view on the line as -:r' of l ig. 1. that thespring-pressed rod 14. will engage 1 represents the head or end portionol i a corner 17 thereof and thus check the movea brake valve casing,and 2 the shaft or m nt. of the lover or handle 5, but permit spindle oithe valve,which latter may be t the latter, by added pressure to thehandle, of any preferred l'orm ol' construction. to pass said corner l7,and thus 'allow the The head of the casing is provided with a handle tobe moved until the stop 12 is sleeve or annular extension 3,throughwhich l reached should it be desired to make an the spindle 2 passes andbeyond which lhe ena-rgency application of the brakes. angular portion 1ol' the spindle [)l'Ujtt'l-fli It i id t. that the portion (3 of the forthe reception of an op .-ratin; l ver or lever or handle 5 maybeutilized for loosenhandle 'l heend ol the lever or handl 5 'ng andtightening the screws 10 with which l the segments are to beadjusted,--said handle being readily removable from the valve spindle. lVarious slight changes might be made in may be made to lorm a wrench t3tor a purpose hercina'l'ter explained.

A portion '7 of the head 1, may be made or a diameter somewhat. lessthan that of the details of construction of my invention withoutdeparting from the spirit thereol or limiting its so pe and hence 1 denot Wish to limit myself to the precise details herein set ferth.

aving fully described my iiivention what claim as new and. desire tosecure by Let ters Patent is:

l. The combination with a manually operated brake valve, of adjustablemeans for graduating the throw of said valve in effecting a release oran applicatien of the brakes.

The cembinatien with a manually cperated brake valve, of stops forlimiting the throw of valve, and means for securing said stopsatdifierent adjustments.

The cembinatien with a brake valve and an eperating handle therefor, oftwo segments for limiting the movements of said 'handle, and means fersecuring said segments at different adjustments.

4. The combination with a brake valve, a

handle attached thereto, and rigid stops for a brake valve, an

mail? the maximum throw of the handle both, directions, of two ad]ustable segments, means for securing said segments at different ad forceis applied to the latter, whereby the valve can he moved for anernemggenc; application of the brake, notwithstanding said adjustablesegment.

7. The combinati handle therefor removably attached to the on with abrake valve, a l

valve and provided with a WIQIlCll-Glld, of

adjustable segments constituting steps for the handle, each of saidsegments having a slot, and headed screws passing through said slots andentering the valve casing for securing the se ments at any desiredadjustment.

8. The combination with a manually oper-v ated brake valve, ofadjustable means fer graduating the throw of said valve in etleel3- inga release or an application of the brakes, and a lever for operating thevalve, said lever being removable from the valve spindle and providedwith a wrench-end.

In tes -mony whereof, I have signed this snecileation in the presence oftwo subscrib iQg' witnesses. h

HOWVARD M. P. MURPHY. Witnesses A. N. MITCHELL, A. S. FERGUSON.

